llvm dev - Mar 2013 - [LLVMdev] Help with LLVM 3.2 linking error

Hello

I'm trying to link my project with llvm 3.2 libraries.
I haven't touched the project for some months. Previously I used to
link to an svn build of llvm 3.1 and
everything worked fine.

I've compiled llvm with ./configure --enable-libcpp --enable-cxx11
Currently I'm only using StringRef, SmallVector and FoldingSet, so I
only link libLLVMSupport and libLLVMCore.
Are they enough or do I need to link something else?

The error I get is the following:
Undefined symbols for architecture x86_64:
  "typeinfo for llvm::FoldingSetImpl", referenced from:
      typeinfo for llvm::FoldingSet<Type> in Program.o
ld: symbol(s) not found for architecture x86_64

Looking at the error the question is: is llvm built with RTTI support
by default? If not, how do I enable it?
i don't find an option in configure --help. If RTTI support is not the
issue, which can be the cause of the error?

Thank you,
Nicola

P.S: I'm sorry in case the list gets two copies of this message, I've
had connection troubles

Nicola Gigante <nicola.gigante at gmail.com> writes:
> The error I get is the following:
> Undefined symbols for architecture x86_64:
>   "typeinfo for llvm::FoldingSetImpl", referenced from:
>       typeinfo for llvm::FoldingSet<Type> in Program.o
> ld: symbol(s) not found for architecture x86_64
>
> Looking at the error the question is: is llvm built with RTTI support
> by default?
No.
> If not, how do I enable it?
AFAIK, there is no method for enabling RTTI (other than modifying the
makefiles).

Il giorno 18/mar/2013, alle ore 15:14, Óscar Fuentes <ofv at wanadoo.es>
ha scritto:
> Nicola Gigante <nicola.gigante at gmail.com> writes:
> 
>> The error I get is the following:
>> Undefined symbols for architecture x86_64:
>>  "typeinfo for llvm::FoldingSetImpl", referenced from:
>>      typeinfo for llvm::FoldingSet<Type> in Program.o
>> ld: symbol(s) not found for architecture x86_64
>> 
>> Looking at the error the question is: is llvm built with RTTI support
>> by default?
> 
> No.
> 
>> If not, how do I enable it?
> 
> AFAIK, there is no method for enabling RTTI (other than modifying the
> makefiles).
Ok, but is it the source of the error? does it comes from the fact that I'm
linking llvm libraries without rtti with
my code that is compiled _with_ rtti? I cannot disable rtti in my code so
it's a problem (at least I think so.
I use dynamic_casts, is -fno-rtti only for typeinfo?)
It sounds strange to me, the same used to apply before, but I didn't
get this error last month with the old setup…

Any hint?

Thank you,
Nicola